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AMIRAVOResearch Library
Cycle-length evidence

Thymalin cycle length: what human studies ran

Not approved — research use onlyBLimited human data
Short answer: there is no established Thymalin cycle length or break. The human studies below ran for set periods under monitoring; none tested repeated courses.

Treatment and follow-up in human studies

  1. The COVID-19 trial and the HIV case series both administered thymalin for 5 days 3,13.
  2. In the 1989 lung-disease study, a treatment course was 4-6 injections 14.

What has not been tested

  • On-and-off schedules or breaks between courses.
  • Repeated courses and long-term exposure beyond the periods listed.
  • Thymalin combined with other compounds, unless a study above says so.

Frequently asked questions

Is there an established Thymalin cycle length?
No. Human studies administered Thymalin for the periods listed on this page. Those are study durations; none tested an on-and-off schedule or a break.
What is the longest human study of Thymalin?
The durations are listed on this page with their sources; compare them directly rather than relying on a summary.
Do study durations tell me how long to use something?
No. A study duration is how long investigators administered a compound to selected participants under monitoring. It is not a recommended course, and a break between courses has not been tested for any compound on this site that is not approved.
Thymalin dosing reference Full research page

References

  1. Thymalin: Activation of Differentiation of Human Hematopoietic Stem Cells Bull Exp Biol Med. 2020
  2. Expression features of T-lymphocytes, B-lymphocytes and macrophages in the post-traumatic regenerate of the mandible rats under conditions of filling a bone defect with hydroxyapatite-containing osteotropic material and thymalin injecting the surrounding soft tissues Pol Merkur Lekarski. 2024
  3. Results and Prospects of Using Activator of Hematopoietic Stem Cell Differentiation in Complex Therapy for Patients with COVID-19 Stem Cell Rev Rep. 2021
  4. [Morphological compound and indicators of the blood clotting system in severe COVID-19 patients of middle aged and elderly during treatment of Tocilizumab and Thymalin] Adv Gerontol. 2022
  5. The Influence of KE and EW Dipeptides in the Composition of the Thymalin Drug on Gene Expression and Protein Synthesis Involved in the Pathogenesis of COVID-19 Int J Mol Sci. 2023
  6. [Treatment of secretory otitis media in children, depending on the stage of the process and on the background of the pathological conditions] Georgian Med News. 2019
  7. Drugs@FDA: FDA-Approved Drugs (search of approved applications) FDA Drugs@FDA / openFDA drug/drugsfda. 2026
  8. DailyMed label search (structured product labels) NLM DailyMed. 2026
  9. [Age-related characteristics of the thymus and adrenal cortex function in CBA mice immunized by T-dependent antigen] Fiziol Zh. 2005
  10. Peptides Regulating Proliferative Activity and Inflammatory Pathways in the Monocyte/Macrophage THP-1 Cell Line Int J Mol Sci. 2022
  11. Bulk Drug Substances Nominated for Use in Compounding Under Section 503A of the FD&C Act, updated May 14, 2026 FDA. 2026
  12. World Anti-Doping Code International Standard: Prohibited List 2026 WADA. 2026
  13. [HIV infection in servicemen (the work experience of a specialized hospital department)] Voen Med Zh. 1995
  14. [Effect of thymalin on immunologic reactivity of patients with non-specific lung diseases] Ter Arkh. 1989
  15. Peptides of pineal gland and thymus prolong human life Neuro Endocrinol Lett. 2003